Add execution environment.

- this class will encapsulate common shared state
- platform will create it
- clients will increment ref count
- platform upon destruction will decrement ref counts
- it means that execution environment will be capable of living longer then
platform in case there will be dependencies.

Change-Id: I0ea7f85ea57448c0e641673f1d15851e50b2b8b2

unit_tests/execution_environment/CMakeLists.txt

@@ -0,0 +1,25 @@
+# Copyright (c) 2018, Intel Corporation
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+
+set(IGDRCL_SRCS_tests_execution_environment
+  ${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt
+  ${CMAKE_CURRENT_SOURCE_DIR}/execution_environment_tests.cpp
+)
+target_sources(igdrcl_tests PRIVATE ${IGDRCL_SRCS_tests_execution_environment})

unit_tests/execution_environment/execution_environment_tests.cpp

@@ -0,0 +1,48 @@
+/*
+* Copyright (c) 2018, Intel Corporation
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "test.h"
+#include "runtime/execution_environment/execution_environment.h"
+#include "runtime/platform/platform.h"
+
+using namespace OCLRT;
+
+TEST(ExecutionEnvironment, givenDefaultConstructorWhenItIsCalledThenExecutionEnvironmentHasInitialRefCountZero) {
+    ExecutionEnvironment environment;
+    EXPECT_EQ(0, environment.getRefInternalCount());
+    EXPECT_EQ(0, environment.getRefApiCount());
+}
+
+TEST(ExecutionEnvironment, givenPlatformWhenItIsConstructedThenItCretesExecutionEnvironmentWithOneRefCountInternal) {
+    std::unique_ptr<Platform> platform(new Platform);
+    ASSERT_NE(nullptr, platform->peekExecutionEnvironment());
+    EXPECT_EQ(1, platform->peekExecutionEnvironment()->getRefInternalCount());
+}
+
+TEST(ExecutionEnvironment, givenPlatformAndExecutionEnvironmentWithRefCountsWhenPlatformIsDestroyedThenExecutionEnvironmentIsNotDeleted) {
+    std::unique_ptr<Platform> platform(new Platform);
+    auto executionEnvironment = platform->peekExecutionEnvironment();
+    executionEnvironment->incRefInternal();
+    platform.reset();
+    EXPECT_EQ(1, executionEnvironment->getRefInternalCount());
+    executionEnvironment->decRefInternal();
+}